Let's solve your inequality step-by-step.<span><span><span>5x</span>+3</span><18
</span>Step 1: Subtract 3 from both sides.<span><span><span><span>5x</span>+3</span>−3</span><<span>18−3</span></span><span><span>5x</span><15
</span>Step 2: Divide both sides by 5. <span><span><span>5x/</span>5</span><<span>15/5
</span></span><span>x<3
</span>Answer:<span>x<<span>3</span></span>
if we look on one side, we already have one measurement. 4 cm. ok, that's the measurement on that side. look to the left now. that other side is also the same length, so we take that number and multiply it be 2 to get

Wait! we're not done yet. look at the top. do you see the 3? well that's the width for the top of the rectangle. the bottom must be the same to right? so we get

add both equations and you get

The answer is 14cm! Don't forget to label. ;)
4 laps because a mile is 1,760 yards and the 440 laps need to be divided into 1,760 so 1,760/440 is 4 so four laps are needed to complete a mile